In a write-up of neighborhood-oriented service Topix and Nextdoor, Wired writer (and former Valleywag editor) Ryan Tate hits upon a point that's perhaps not obvious to anyone who's ever wondered why they don't know people they've lived next to for years: the most efficient organizer is a common purpose. If you'd like a greater sense of security when you leave your home and its valuables, or just get to know the people around you, consider fundraising drives, petitions, and other common action-oriented interests you all might have as a potential primer. [Wired] (Photo by le Korrigan.)